Liquid-heating system.



PATENTED MAY 21, 1907.

placed within afurnace.

UNITED STATES PATENT OFFICE.

LlQlilP-HEATING SYSTEM.

Specification of Letters Patent.

Patented May 21, 1907.

Application filed April 9,1906. Serial No. 310,719.

To all whom it may concern.-

Be it known that 1, JOHN C. BARTLETT, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Liquid-Heating Systems, of which the following is a specification.

One object of my invention is to provide a liquid heating system which shall include two heating devices, and be capable of so controlling the flow of 11 uid that if said liquid be not heated to -a pre etermined temperature in the first of the heating devices, it will be automatically directed'to the second heating device where its temperature will be raised to the desired point. 1n the event of the liquid from the first heating device being already at the desired tem erature, I so arran e the a paratus that said liquid is delivere direct y to the hot main Without being required to pass through the second heating device.

Another object of the invention is to provide a novel form of automatic flow controlling device for use in connection with such a system as that above outlined.

These objects I attain as hereinafter set forth, reference being had to the accompanyin drawings, in which:

. 'gure 1, is a diagrammatic view of a liquid heating system designed according to my invention Fig. 2, is a diagrammatic view illustrating a modification of the liquid heatin system shown in Fig. 1; Fig. 3, is a'sectiona plan, illustrating in detail one form of the improved flow controlling device emplo ed in connection with the system illustrated in Fig. 1, and Fig. 4, is a vertical section of that form of the flowcontrolling device illustrated in Fig. 2.

Referring to Fig. 1, of the above drawings,

A is a hot water boiler such, for exam le, as the commonrange boiler, having a co d water inlet pipe (1 and providedwith any desired means for heating the water within it; in the case illustrated a gas heater a connected to the top and bottom of said boiler. It is, of course, obvious that there are numerous other ways for heating the water within the boiler A; such, for exam le, as shown in Fig. 2, by means of a coil of pipe a designed to be 7 In any case, the arrangement is such that the boiler A constitutes a source of supply of hot liquid and has connected to its upper portion an outlet p1pe a, which enters a casing B containing certain flow controlling apparatus hereinafter described. This casing is provided with two other openings, to one of which is connected an-outlet pi e or hot main b leading to any point to WhlCh hotwater is to be supplied,

while to the other is connected a p1pe b leading to an auxiliary water heater 0. This latter heater is preferably of the well known gas operated type provided with means for automatically turning on and lighting aburner whenever the liquid passing through its coils is below a predetermined temperature,

-- 1s connected to the hot water main b, so that it delivers directly to the place at which such water is used.

The casing B has in addition to the three openings b 6 and b for the pipes a, b and b a conduit 6 in connection with the opening I), which conduit is rovided with a valve seat b. The opening 3 is similarly provided with a valve seat I) and, in the present instance, the center lines of these two seats are coincident. Co'acting with said seats I) and b are two valves 'd and 0 carried upon a common rod 11 of such length that when one valve is seated the other is necessarily some distance from its seat. Also within the casing is placed a thermostat D, in the present instancesemi-circular in form, one end of which is fixed to a piece (i carried upon a screw (1 projecting through the wall of the casing B into a recess 6 closed by a plug b Said screw is headed and though passing loosely through the casingwall is normally held in its innermost position by means of a s ring (i confined between its head and the p)ug b. The opposite end ofthe thermostat is adjustably connected to the valve rod d by means of a pair of nuts (1 and d threaded upon said rod, thus allowing the point of its attachment to the thermostat to be varied as may be found necessary.

Under operating conditions, the thermostat and the valves attached thereto are so adjusted that so long as the water or other liquid from'the reservoir A entering at b is at the redetermined temperature, the valved Will e held upon its 'seat 6, ther'ebyleaving Y unseated thevalve d and permitting liquid to" flow from said opening I)? througbh the casing -1nt o ts conduit 6 to the main and to.the point of consumption.

If, for any reason, the liquid coming from the boiler A should be at a temperature below that predetermined, the thermostat D B gelled which t e thermostat D seats the valve (1.

' If desired, the thermostat instead of being of the form illustrated in Fig. 3, may be of the well known elongated tfie and placed directly within the boiler as clearly illustrated at D in Fig. 4. any case, however, its operation is the same as that above noted.

In the event of the fluiddeliveredto the casing Bthrough the opening I) being at an excessively high temperature, there would be a tendency to undue distortion of the thermostat and in order to obviate the ossibility of damage from this cause I provi' e the constructionillustrated in Fig. 3, wherebyin the event of such conditions as, those above noted, the spring d would be compressed and the su porting screw 'd" forced to a greater or ess extent into the recess 1). When the abnormal conditions no longer exist said spring d forces the screw d into the casing until its head contacts "with'the bottom of the recess 6 after which thefurther bending together of the ends of" the thermostat unseats the valve d.

I claim'as my invention:

v 1. A liquid heating system consisting of a main heater, an auxiliary heater, connections 'for the inlet and outlet of liquid to andfrom .the'system; a device connected to said heaters having means 'for automatically directing liquid received from the main heater, either to the auxiliary heater-or to the outlet, de-

.- substantially pending on whether the temperature of said iquid is below a predetermined point. or not,

as described.

2. A liquid heating system consistin of a main heater connected to a source of iquid means for directing liqui sup ly, an auxiliary heaterconnected to a disc arge main, a conduit connecting said heaters, and. a device connected in said conduit and to the discharge main, said device including. aute matic tem erature actuated entering it from the main heater either to the auxilia heater or to the discharge main, substantialgr as dcscribed. a

charge pipes connected to the system, a casing connected between the heaters and also "in connection with the discharge conduit, a thermostat in said casing, and valves actureceived from the main heater either to the auxiliary heater or to the discharge main, substantially as described.

4 A liquid heating s stem main and an auxiliary eater, a casin connected between said heaters, a disc arge main connected to the auxiliary heater and valves in the casing respectively controlling passages to the auxiliar heater and to'the discharge main, and a t ermostat for actuating said valves, substantially as described. 5. Aliquid heating system consisting of a inain and an auxiliary heater, a casing connected between said heaters, a discharge main connected to the auxiliaryheater-and to 'the cas'in'g, a liquid inlet for the system,

passages to the auxiliary heater and to the ating said valves, with means for adjustably connecting the thermostat to said valves, substantially as described. 6. A liquid heatings stem includinga'reservoir for liquid, an inlet thereto, meanslfor supplying heated liquid to said'reservoir, an auxiliary heater; a ischarge-main connected thereto, a casi heaters and also to the discharge main, two valves in the casing respectively controlling the openings therefrom to. the auxiliary mostat in the casing constructed to open the valve to the auxiliary heater and close that to the discharge when thetemperature of the liquidentering it from the reservoir is below a predetermined 'oint, and to close the valve to the auxiliary eater and open that to the discharge main when the temperature of said liquid is'above a redetermined point, substantiall as described. if

7. Ahquid heating system consisting of a main and an auxiliary heater, 'a conduit connecting said heaters, I liquid. inlet and dis charge-pipes connected to the system, 8. casing having openings connected between the heaters and in connection with the discharge conduit, valves respectively for certain of the casing openings, a rod connecting said valves, and a curved thermostat connected to the rod and to the casing, substantially as'described. y

A liquid heating system consisting of a mjain and an auxiliary heater, a conduit conconnected between the heaters and in 3 Aliquid heating system consisting of a I main and an auxiliary heater, aconduit con-- necting said heaters, liquid inlet and disconsisting of a to the casing, a liquid inlet for "the system,

valves in the casing respectively controlling connected to both of said heater and to the discharge main, and ath'ern ct'ing said heaters, liquid inlet 'and dise arge pipes connected to the system, a case ated by said thermostat for directing liquid f discharge main, and a thermostat 'for actu-V connection with the discharge conduit,va1ves In testimony whereof, I have signed my placed to control the flow of liquid from the name to this specification, in the presence of easing, a thermostat connected to said valves, two subscribing witnesses.

the casing having a plug-closed recess, a rod JOHN C. BARTLETT. connected to the thermostat extending into Witnesses: said recess and a spring in the recess 0 ere- VM. E. SHU'PE,

tive on said rod, substantially. as described. Jos. H. KLEIN. 

